/Engine/Source/Runtime/Experimental/ChaosCore/Public/Chaos/Rotation.h
Uses the Quaternion to Axis/Angle method.
static TVector< FRealDouble, 3 > CalculateAngularVelocity2 &40; const TRotation< FRealDouble, 3 > & R0, const TRotation< FRealDouble, 3 > & InR1, const FRealDouble InDt &41;